title: Impact of retropharyngeal lymph node metastasis in head and neck squamous cell carcinoma.
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000556:secondary*; D015331:Cohort Studies; D018572:Disease-Free Survival; D005260:Female; D006258:Head and Neck Neoplasms / Q000473:pathology*; D006801:Humans; D008197:Lymph Node Excision; D008207:Lymphatic Metastasis / Q000175:diagnosis* / Q000532:radiotherapy; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D011379:Prognosis; D018714:Radiotherapy, Adjuvant; D012189:Retrospective Studies; D015996:Survival Rate